Arboviral Surveillance Archives

Eastern Equine Encephalitis (EEE) and West Nile Virus (WNV) are arboviral illnesses spread by the bite of an infected mosquito. Mosquito, animal, and human specimens are tested for the presence of EEE and WNV at Maine's Health and Environmental Testing Laboratory (HETL). Animal specimens may also be tested through the National Veterinary Services Laboratory (NVSL). The state of Maine organizes routine mosquito trapping at selected sites, and routinely tests those mosquitoes for disease. The mosquito trapping season runs from July to September. Maine no longer routinely tests birds.

Maine Arboviral Positive Results

Surveillance Species Collection Date Town County Agent
Mosquito Culex salinarius August 27, 2014 York York EEE
Mosquito Culiseta melanura August 22, 2014 York York EEE
Mosquito Coquillettidia perturbans August 22, 2014 York York EEE
Mosquito Aedes vexans August 22, 2014 York York EEE
Veterinary Emu September 2, 2014 Cumberland EEE
Mosquito Culiseta melanura August 20, 2014 Alfred York EEE
Mosquito Culiseta melanura September 4, 2014 York York EEE
Mosquito Culiseta morsitans September 4, 2014 York York EEE
Mosquito Culex salinarius September 4, 2014 York York EEE
Mosquito Psorophora ferox September 4, 2014 York York EEE
Mosquito Aedes vexans September 4, 2014 York York EEE
Mosquito Coquillettidia perturbans September 4, 2014 York York EEE
Mosquito Ochlerotatus canadensis September 4, 2014 York York EEE
Mosquito Aedes vexans September 10, 2014 York York EEE
Mosquito Ochlerotatus canadensis September 10, 2014 York York EEE
Mosquito Culiseta melanura September 7, 2014 Buxton York EEE
Mosquito Culiseta melanura September 30, 2014 York York EEE
Mosquito Culiseta morsitans September 30, 2014 York York EEE
Mosquito Ochlerotatus canadensis September 30, 2014 York York EEE
Mosquito Culiseta melanura September 30, 2014 York York EEE
Mosquito Culiseta melanura September 30, 2014 York York EEE
Mosquito Psorophora ferox September 30, 2014 York York EEE
Mosquito Aedes vexans September 30, 2014 York York EEE
Human October 1, 2014 York EEE
Human September 11, 2015 Cumberland WNV
Mosquito Culiseta melanura September 11, 2015 Alfred York EEE
Mosquito Culiseta melanura September 20, 2015 Waterboro York WNV
Human October 8, 2015 York EEE
Human June 11, 2017 Kennebec Jamestown Canyon virus
Human July 13, 2017 Franklin Jamestown Canyon virus
Human August 15, 2018 Cumberland WNV
Mosquito Culex pipiens August 21, 2018 Kittery York WNV
Veterinary Horse September 15, 2018 York WNV
Mosquito Culiseta melanura September 18, 2018 York York WNV
Mosquito Culex pipiens/restuans September 5, 2018 Bangor Penobscot WNV
Mosquito Culex pipiens/restuans September 6, 2018 Bangor Penobscot WNV
Human September 15, 2018 Cumberland WNV
Human September 16, 2018 Knox Jamestown Canyon Virus
Veterinary Horse August 28, 2019 York EEE
Mosquito Culiseta melanura September 6, 2019 Lebanon York EEE
Mosquito Culiseta melanura September 18, 2019 Alfred York EEE
Human November 22, 2021 York Jamestown Canyon Virus
Mosquito Aedes cantator July 11, 2023 Wells York JCV
Mosquito Aedes cantator July 11, 2023 Wells York JCV
Mosquito Aedes cantator July 11, 2023 Wells York JCV
Mosquito Culiseta melanura September 7, 2023 Lebanon York EEE
Veterinary Emu September 13, 2023 Piscataquis EEE
Veterinary Emu September 13, 2023 Piscataquis EEE
Veterinary Emu September 13, 2023 Piscataquis EEE
Veterinary Emu September 13, 2023 Piscataquis EEE
Veterinary Horse September 18, 2023 Piscataquis EEE
Mosquito Culiseta morsitans September 21, 2023 Greenbush Penobscot WNV
Mosquito Culiseta morsitans September 21, 2023 Greenbush Penobscot EEE
Mosquito Culiseta melanura September 22, 2023 Bangor Penobscot EEE
Veterinary Horse September 25, 2023 Penobscot EEE
Mosquito Culiseta melanura October 5, 2023 Benton Kennebec EEE
Veterinary Horse October 6, 2023 York WNV
Mosquito Culiseta melanura October 3, 2023 Berwick York EEE
Veterinary Horse October 7, 2023 Waldo EEE
Veterinary Emu October 11, 2023 Penobscot EEE
Veterinary Emu October 11, 2023 Penobscot EEE
Veterinary Emu October 11, 2023 Penobscot EEE
Veterinary Emu October 11, 2023 Penobscot EEE
Veterinary Horse October 16, 2023 Cumberland EEE
Veterinary Emu October 16, 2023 Somerset EEE
Veterinary Emu October 16, 2023 Somerset EEE
Veterinary Emu October 16, 2023 Somerset EEE
Veterinary Emu October 16, 2023 Somerset EEE
Veterinary Common Raven October 3, 2023 Hancock EEE
Veterinary Red-tailed Hawk October 17, 2023 Oxford WNV
Veterinary American Crow November 5, 2023 Penobscot WNV

Archived Weekly Updates

  • 2022